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NGC 2217

NGC 2217
Credit:ESO
观测资料(J2000 历元
星座大犬座
赤经06h 21m 40.35s[1]
赤纬-27° 13′ 56.90″[1]
红移0.005400[2]
径向速度1619 km/s[2]
距离73 Mly 22.4 Mpc[2]
视星等 (V)11.71[2]
特征
类型(R)SB0+(rs)[2]
角直径 (V)4.44 ′ 4.84 arcminutes[1]
其他名称
MCG-05-15-010、​PGC 18883[2]
参见:星系星系列表

NGC 2217是位于大犬座的一个透镜状星系,直径约10万光年,距离地球约6500万光年。它是NGC 2217星系群的一部分,它被归类为棒旋星系

此星系的一个显著的特征是这个星系独有的漩涡形状。它的中心区域恒星非常密集,形成一个独特的,明亮的恒星棒,外围则是一个椭圆形的环。星系的更远处可以看到一螺旋臂紧紧缠绕在恒星棒上,使其几乎形成一个圆环星系

恒星棒在星系的发展中起着重要的作用。例如,它可以把气体运输到星系的中心而被中央的星系黑洞吞噬,或形成新的恒星。[1]

参考

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NGC 2217
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